Houdini’s alembic import module, by default installation, doesn’t work well with alembic files on the network.
You’ll notice that you can only load .abc files on your local drive, and not those on the network drive.

This can be resolved by adding this line to the houdini.env files:

HOUDINI_ACCESS_METHOD = 2

In case you’re wondering where your houdini.env file is, it’s usually located here: